Process for the production of urea having a low carbamate conten

Details Process for the production of urea having a low carbamate conten Process for the production of urea having a low carbamate conten

1976-10-18

1978-05-30

Thomas, Earl C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12600

Patent

active

040923584

ABSTRACT:
The improvement in the process for production of urea wherein carbon dioxide and excess ammonia are reacted in a synthesis zone producing a solution of urea contaminated with ammonium carbamate which is decomposed in a decomposer having a pressure lower than the pressure in the synthesis zone which comprises allowing the solution which passes into the decomposer to flow as a thin film over a surface heated to an extent sufficient to cause at least a part of the ammonium carbamate to decompose into gaseous carbon dioxide and ammonia, the latter recycled to the synthesis zone.

REFERENCES:
patent: 2848493 (1958-08-01), Dewling et al.
patent: 3301897 (1967-01-01), Cook
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3406201 (1968-10-01), Bauman et al.
patent: 3514484 (1970-05-01), Wentworth
patent: 3530180 (1970-09-01), Giommi
patent: 3711544 (1973-01-01), Summerville
patent: 3816528 (1974-06-01), Cook
patent: 3867442 (1975-02-01), Logemann
patent: 3876696 (1975-04-01), Guadalupi et al.

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